A method for comparing a reception beam incident on a laser receiver with a rotating laser beam transmitted by a rotating laser in a direction of rotation, where the laser receiver includes an evaluation unit and a detection field having a first measuring range and a second measuring area, includes, when the reception beam is incident on the detection field, determining a first reception signal which represents a first time trend of the incident reception beam in the first measuring range and a second reception signal which represents a second time trend of the incident reception beam in the second measuring range. A direction of movement of the reception beam relative to the laser receiver from the first and the second reception signals is determined. The direction of the movement of the reception beam is compared by the evaluation unit with the direction of rotation of the rotating laser beam.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method for comparing a reception beam incident on a laser receiver with a rotating laser beam, which is emitted by a rotating laser, in a direction of rotation around an axis of rotation, wherein the laser receiver includes an evaluation unit and a detection field with a first measuring range and a second measuring range, comprising the steps of: determining, upon incidence of the reception beam on the detection field of the laser receiver, a first reception signal which represents a first time trend of the incident reception beam in the first measuring range by the evaluation unit, and a second reception signal which represents a second time trend of the incident reception beam in the second measuring range by the evaluation unit; determining a direction of movement of the reception beam relative to the laser receiver from the first and the second reception signals by the evaluation unit; and comparing the direction of movement of the reception beam by the evaluation unit with the direction of rotation of the rotating laser beam.
2. The method according to claim 1 further comprising the step of classifying the reception beam as a foreign beam by the evaluation unit if the first time trend and the second time trend essentially match.
3. The method according to claim 1 , wherein the direction of movement of the reception beam is determined by the evaluation unit if the first time trend is different from the second time trend.
4. The method according to claim 3 further comprising the step of classifying the reception beam by the evaluation unit as a reflected laser beam if the direction of movement of the reception beam and the direction of rotation of the rotating laser beam are opposite one another.
5. The method according to claim 1 further comprising the step of classifying the reception beam by the evaluation unit as a rotating laser beam if the direction of movement of the reception beam and the direction of rotation of the rotating laser beam are in a same direction.
6. The method according to claim 5 further comprising the step of switching the laser receiver by the evaluation unit into a measuring mode, wherein a position of the reception beam is determined in a longitudinal direction of the detection field.
7. The method according to claim 1 further comprising the step of moving the rotating laser beam by an angle of 360° around the axis of rotation and wherein the angle of 360° is subdivided into a first angle range and a second angle range, wherein the rotating laser beam is different in the first and the second angle ranges in one beam property or in a plurality of beam properties.
8. The method according to claim 7 further comprising the step of modulating the rotating laser beam with a modulation signal, wherein a first modulation signal is used in the first angle range and a second modulation signal is used in the second angle range and wherein the first modulation signal is different from the second modulation signal.
9. A device, comprising: a rotating laser which emits a laser beam rotating in a direction of rotation around an axis of rotation; and a laser receiver which includes an evaluation unit and a detection field with a first measuring range and a second measuring range; wherein the device performs the method according to claim 1 .
10. The device according to claim 9 , wherein the laser receiver includes a first detection field and a second detection field separated by a distance, wherein the first detection field includes the first measuring range and the second detection field includes the second measuring range.
11. The device according to claim 9 , wherein the laser receiver includes an inclination sensor which measures an inclination of the laser receiver relative to a direction of gravitation of the gravitational field.
12. The device according to claim 9 , wherein the rotating laser and the laser receiver are connectable via a communication connection and wherein a communication between the evaluation unit of the laser receiver and a control unit of the rotating laser takes place.
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June 21, 2017
February 18, 2020
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